Fix the source map directory resolution with non case sensitive file names

Author: sheetalkamat

src/compiler/core.ts

@@ -476,7 +476,7 @@ module ts {
         }
     }
 
-    export function getRelativePathToDirectoryOrUrl(directoryPathOrUrl: string, relativeOrAbsolutePath: string, currentDirectory: string, isAbsolutePathAnUrl: boolean) {
+    export function getRelativePathToDirectoryOrUrl(directoryPathOrUrl: string, relativeOrAbsolutePath: string, currentDirectory: string, getCanonicalFileName: (fileName: string) => string, isAbsolutePathAnUrl: boolean) {
         var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
         var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
         if (directoryComponents.length > 1 && directoryComponents[directoryComponents.length - 1] === "") {
@@ -487,7 +487,7 @@ module ts {
 
         // Find the component that differs
         for (var joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
-            if (directoryComponents[joinStartIndex] !== pathComponents[joinStartIndex]) {
+            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
                 break;
             }
         }

src/compiler/emitter.ts

@@ -527,7 +527,8 @@ module ts {
                     sourceMapData.sourceMapSources.push(getRelativePathToDirectoryOrUrl(sourcesDirectoryPath,
                         node.filename,
                         compilerHost.getCurrentDirectory(),
-                    /*isAbsolutePathAnUrl*/ true));
+                        compilerHost.getCanonicalFileName,
+                        /*isAbsolutePathAnUrl*/ true));
                     sourceMapSourceIndex = sourceMapData.sourceMapSources.length - 1;
 
                     // The one that can be used from program to get the actual source file
@@ -692,7 +693,8 @@ module ts {
                             getDirectoryPath(normalizePath(jsFilePath)), // get the relative sourceMapDir path based on jsFilePath
                             combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), // this is where user expects to see sourceMap
                             compilerHost.getCurrentDirectory(),
-                        /*isAbsolutePathAnUrl*/ true);
+                            compilerHost.getCanonicalFileName,
+                            /*isAbsolutePathAnUrl*/ true);
                     }
                     else {
                         sourceMapData.jsSourceMappingURL = combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
@@ -3170,7 +3172,8 @@ module ts {
                     getDirectoryPath(normalizeSlashes(jsFilePath)),
                     declFileName,
                     compilerHost.getCurrentDirectory(),
-                /*isAbsolutePathAnUrl*/ false);
+                    compilerHost.getCanonicalFileName,
+                    /*isAbsolutePathAnUrl*/ false);
 
                 referencePathsOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
             }

src/harness/projectsRunner.ts

@@ -226,7 +226,8 @@ class ProjectRunner extends RunnerBase {
                     ? filename
                     : ts.normalizeSlashes(testCase.projectRoot) + "/" + ts.normalizeSlashes(filename);
 
-                var diskRelativeName = ts.getRelativePathToDirectoryOrUrl(testCase.projectRoot, diskFileName, getCurrentDirectory(), false);
+                var diskRelativeName = ts.getRelativePathToDirectoryOrUrl(testCase.projectRoot, diskFileName,
+                    getCurrentDirectory(), Harness.Compiler.getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
                 if (ts.isRootedDiskPath(diskRelativeName) || diskRelativeName.substr(0, 3) === "../") {
                     // If the generated output file resides in the parent folder or is rooted path, 
                     // we need to instead create files that can live in the project reference folder

tests/baselines/reference/sourceMapWithNonCaseSensitiveFileNames.js.map

@@ -2,11 +2,11 @@
 JsFile: fooResult.js
 mapUrl: fooResult.js.map
 sourceRoot: 
-sources: ../testFiles/app.ts,../testFiles/app2.ts
+sources: app.ts,app2.ts
 ===================================================================
 -------------------------------------------------------------------
 emittedFile:tests/cases/compiler/testfiles/fooResult.js
-sourceFile:../testFiles/app.ts
+sourceFile:app.ts
 -------------------------------------------------------------------
 >>>// Note in the out result we are using same folder name only different in casing
 1 >
@@ -88,7 +88,7 @@ sourceFile:../testFiles/app.ts
 ---
 -------------------------------------------------------------------
 emittedFile:tests/cases/compiler/testfiles/fooResult.js
-sourceFile:../testFiles/app2.ts
+sourceFile:app2.ts
 -------------------------------------------------------------------
 >>>var d = (function () {
 1->